The noise canceller collects the noise signal in a certain area, converts it into an electrical signal and sends it to the processing circuit. After processing, the noise that is inverse to the original noise can be emitted through the speaker, and the noise can cancel each other in a certain area. To achieve the purpose of eliminating noise.
This equipment is not only suitable for those occasions that require quietness, such as classrooms, libraries, offices, bedrooms, wards, etc.; it is also suitable for those occasions where noise is very loud and needs to be reduced, such as large factory workshops, noisy vegetable markets, and shopping malls. Wait.
Program overview
The Ameya360 noise canceller solution is a speaker amplifier with environmental noise cancellation (ANC) function, which can reduce background environmental noise and improve the audio quality of handheld devices, headsets, and voice communication devices. The bandwidth processed by ANC is 10Hz~2000Hz, and the noise is reduced by 10dB-30dB. It is mainly used for earphones, handheld devices, mobile phones, hands-free cards and voice communication equipment. AS3400/10/30 speaker driver has environmental noise reduction function for mobile phones and earphones.
Its purpose is to improve sound quality by reducing background environmental noise, for example, when listening to music or talking on the phone. Its omni-directional simulation reduces power consumption and system BOM cost, with natural voice enhancement. This is commendable in the DSP environment.
The design of the device is reasonable and can be easily applied to the existing architecture. It can be used in different configurations to coordinate noise cancellation, filtering function, and structural design. The design uses a simple, feed-forward topology, which effectively reduces low-frequency background noise. Its feedback topology and 1 or 2 filter stages can be used for a larger frequency range to reduce noise, and even implement transmission functions such as speaker equalization, Baxandall equalization, high/low shelving filtering, and setting a predefined ring Road bandwidth. Through the simple R and C components of specific size, the user optimizes the filter circuit for specific mobile phone and structural design.
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